| 东天山尾亚复式岩株形成时代讨论 |
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| 引用本文： | 李嵩龄,李文铅,冯新昌,董富荣.东天山尾亚复式岩株形成时代讨论[J].新疆地质,2002,20(4):357-359. |
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| 作者姓名： | 李嵩龄 李文铅 冯新昌 董富荣 |
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| 作者单位： | 新疆维吾尔自治区地质矿产勘查开发局第一区域地质调查大队,新疆,乌鲁木齐,830011 |
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| 摘 要： | 尾亚复式岩株由尾亚超单元（外环）及环形山超单元（内环）组成。由完全不同成分、不同岩浆源的两个独立岩浆作用，沿同一通道就位的产物。外环为碱性辉长岩、石英正长岩、碱长花岗岩，内环为钙碱系列的石英闪长岩－花岗闪长岩－二长花岗岩－钾长花岗岩。北侧侵入于早石炭世卡拉火大山组及白尖山超单元中。依据同位素年龄测定，其生成年龄270.67-267.3Ma，为早二叠世；环形山超单元生成年龄230－250Ma，为晚二叠世。
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| 关 键 词： | 形成时代 复式岩株 同位素年龄 晚二叠世 岩浆 |
| 文章编号： | 1000-8845(2002)04-357-03 |
| 修稿时间： | 2002年4月15日 |
AGE OF FORMATION OF WEIYA COMPOSITE STOCKS IN EASTERN TIANSHAN MOUNTAINS |
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| LI Song-lin,LI Wen-qian,FENG Xin-chang,DONG Fu-rong.AGE OF FORMATION OF WEIYA COMPOSITE STOCKS IN EASTERN TIANSHAN MOUNTAINS[J].Xinjiang Geology,2002,20(4):357-359. |
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| Authors: | LI Song-lin LI Wen-qian FENG Xin-chang DONG Fu-rong |
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| Abstract: | Weiya composite stocks comprise a circular body including Weiya super-unit (outer circle) and Huanxinshan super-unit (inner circle). It is a product of two phases of magmatic intrusion with different composition and magmatic source along the same intrusive passage. The outer circle consists of alkaline gabbro, quartz syenite and alkali-feldspar granite. The inner circle consists of quartz diorite-granodiorite-adamellite-moyite of calc-alkaline series. The stocks intruded into mylonitized Karahodashan Formation with early Carboniferous fossils and Baijianshan super-unit. The isotopic dating gives an age of 270.67-267.3 Ma for Weiya super-unit, and 230-250 Ma for Huanxinshan super-unit. Therefore the age of formation of Weiya composite stocks is constrained as Permian. |
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| Keywords: | the eastern Tianshan mountains composite stocks super-unit isotopic age age of formation |
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